No oil to rockers?

Mike Taylor 3601 · 01-30-2025, 05:24 PM

if nothing has been done with cam bearings and was oiling before cam change...
early small journal blocks have to have groove/flat spot in cam...pull lifter and spin drill and see if oil is flowing out of oil galley in lifter bore
if all that is right look at lifters... pull lifter apart and you should see a clear path for oil to pass and go through pushrod seat..
there will be a disc(valve) that sits against bottom of pushrod seat and there should be away for oil to go between disc and pushrod seat. it may have a embossed/raised place stamped in disc with a small spot that isn't embossed,leaving a small groove for oil to pass. some have the bottom of pushrod seat curved, both styles I have seen not oil.basically the disc seals against the bottom of pushrod seat and has a small place for oil to flow through.. if it does'nt which is a defect I cut a small groove in bottom of pushrod seat so oil can pass between disc and pushrod seat to oil pushrod/rocker..
lifter should have oil hole on outside in the groove,have seen them missing...
if hole is in body above oil band then it wrong for hydraulic

Lyn Smith · 01-30-2025, 07:03 PM

Removed the intake and pulled out #8 cylinder exhaust lifter. Spun pump over and oil gushes out of the open hole. Lifters seemed to be pumped up, but still no oil out of top of them. Going to install a set of Comp hydraulics tomorrow.

01-30-2025, 07:48 PM

Quote:

Originally Posted by Lyn Smith

Removed the intake and pulled out #8 cylinder exhaust lifter. Spun pump over and oil gushes out of the open hole. Lifters seemed to be pumped up, but still no oil out of top of them. Going to install a set of Comp hydraulics tomorrow.

Lyn, Leave lifters in and spin pump, look for too much oil escaping onto cam and beliw lifter. Sounds like it?s not getting to the pushrod oil hole on the side. - thus the slot I was talking about. If it has two holes only barely slot one.

Pm sent

Mike Taylor 3601 · 01-31-2025, 09:59 AM

Quote:

Originally Posted by Barry Polley

Lyn, Leave lifters in and spin pump, look for too much oil escaping onto cam and beliw lifter. Sounds like it?s not getting to the pushrod oil hole on the side. - thus the slot I was talking about. If it has two holes only barely slot one.

Pm sent

hydraulic lifters will have the oil hole in the oil band/groove of lifter,that lets oil flow through oil galleys.
the lifter that have to be slotted sometimes won't be hydraulic, will be soild roller or flat tappet the oil hole is above the band and that meters the oil sometimes it meters too good,then you have to make a small groove from oil band to oil hole which is above the oil band..
another check after you see oil galley is getting oil ar rear is to pull front lifter and check oil flow there, to verify the oil bands on lifters are lined up in the oil galley allowing oil to pass lifters

ron mattson · 02-02-2025, 06:58 PM

I saw a 327 that wasn?t oiling to the rockers and it
needed lash .003-.004 to oil the rockers it had longer
pushrods which changed the position of the oil hole in
the pushrod to oil hole in the rocker and without lash it would
not oil, put .004 in it and boom it oiled.

01-30-2025, 05:24 PM	#1
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,362 Likes: 336 Liked 279 Times in 96 Posts	Re: No oil to rockers? if nothing has been done with cam bearings and was oiling before cam change... early small journal blocks have to have groove/flat spot in cam...pull lifter and spin drill and see if oil is flowing out of oil galley in lifter bore if all that is right look at lifters... pull lifter apart and you should see a clear path for oil to pass and go through pushrod seat.. there will be a disc(valve) that sits against bottom of pushrod seat and there should be away for oil to go between disc and pushrod seat. it may have a embossed/raised place stamped in disc with a small spot that isn't embossed,leaving a small groove for oil to pass. some have the bottom of pushrod seat curved, both styles I have seen not oil.basically the disc seals against the bottom of pushrod seat and has a small place for oil to flow through.. if it does'nt which is a defect I cut a small groove in bottom of pushrod seat so oil can pass between disc and pushrod seat to oil pushrod/rocker.. lifter should have oil hole on outside in the groove,have seen them missing... if hole is in body above oil band then it wrong for hydraulic

01-30-2025, 07:03 PM	#2
Lyn Smith VIP Member Join Date: Dec 2001 Location: Pontiac,il. Posts: 1,194 Likes: 273 Liked 950 Times in 189 Posts	Re: No oil to rockers? Removed the intake and pulled out #8 cylinder exhaust lifter. Spun pump over and oil gushes out of the open hole. Lifters seemed to be pumped up, but still no oil out of top of them. Going to install a set of Comp hydraulics tomorrow.

02-02-2025, 06:58 PM	#5
ron mattson Member Join Date: Nov 2005 Location: cloquet mn Posts: 464 Likes: 17 Liked 66 Times in 29 Posts	Re: No oil to rockers? I saw a 327 that wasn?t oiling to the rockers and it needed lash .003-.004 to oil the rockers it had longer pushrods which changed the position of the oil hole in the pushrod to oil hole in the rocker and without lash it would not oil, put .004 in it and boom it oiled. __________________ Ron Mattson 5015 STK